Huck International, Inc.

Mark R Plunkett

Shahriar M Sadri

Marvin R Hicks

Keith D Nordyke

A clamping tool for removing the gap between and temporarily clamping workpieces together for subsequent fastening and having a cable actuated toggle member for engagement with one side of the workpieces and a nut member engageable with the opposite side of the workpieces.

Blind alignment and clamp up tool

In general a torque controlled blind bolt for securing workpieces is shown and which blind bolt has a core pin with a blind side head and a plurality of threads and a nut adapted to be threaded onto the pin threads; the blind bolt which has a main sleeve structure and an expandable blind side sleeve structure is set by torque applied between the pin and nut which causes the expandable sleeve to be expanded by the pin head and to thereby form a load bearing blind head; the blind fastener includes a grip adjuster structure which defines a cavity having a depth selected to define the grip range of the fastener with the grip cavity generally located externally of the workpieces; an anti-rotation structure is formed between the pin head and the expandable sleeve structure to inhibit relative rotation in response to the torque applied between the nut and the pin.

High strength torque type blind bolt with anti-rotation

In general a blind fastener for securing workpieces is shown and which blind bolt has a core pin with a blind side head and a plurality of threads or locking grooves and a nut adapted to be threaded onto the pin threads; the blind bolt which has a main sleeve structure and an expandable blind side sleeve structure is set by a relative axial force applied to the pin which forces the expandable sleeve structure against the main sleeve structure causing the expandable sleeve to expand and form a load bearing blind head; the blind fastener includes a grip adjuster structure which defines a cavity having a depth selected to define the grip range of the fastener with the grip cavity generally located externally of the workpieces; the core pin head acts on the expandable sleeve and main sleeve structures to cause a frangible portion in the grip adjuster structure to shear and receive the main sleeve structure after which the blind head engages the blind side of the workpieces, with none of the clamp load developed being shared by the main sleeve structure. The blind threaded fastener can be adapted to be installed by the same installation tool used to install non-blind threaded fasteners of the same nominal diameter.

High strength blind bolt with uniform high clamp over an extended grip

A high strength, high clamp blind bolt for fastening structural workpieces, which blind bolt has a core pin with a blind side head and a plurality of locking grooves or threads, a high stand-off collar adapted to be swaged into the locking grooves or a nut adapted to be threaded onto the pin threads, a compression frangible main sleeve structure and an expandable, short fixed length blind side sleeve structure; the blind bolt is set by a relative axial force applied to the pin which forces the short blind sleeve structure against the main sleeve structure causing the blind side sleeve to expand and form a blind side structural load bearing blind head; the relative axial force can be applied by pulling in a swage configuration or by torque in a threaded configuration; the core pin head acts on the main sleeve structure to cause a frangible portion to shear and reduce the main sleeve structure length after which the blind head engages the blind side of the workpieces; the high stand-off collar is then swaged into the pin lockgrooves or the nut is threaded further onto the core pin with none of the clamp load developed being shared by the collapsed main sleeve structure resulting in a fastener having a high, uniform workpiece clamp load, a high, uniform tensile strength, and a fixed, short back side protrusion over a wide grip range.

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Irvine, CA, United States of America

Mark R Plunkett